Compare · ModelsLive · 2 picked · head to head
Gemini 2.5 Pro vs GPT-5 Chat
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GPT-5 Chat wins on 4/7 benchmarks
GPT-5 Chat wins 4 of 7 shared benchmarks. Leads in coding · knowledge · language.
Category leads
coding·GPT-5 Chatarena·Gemini 2.5 Proknowledge·GPT-5 Chatlanguage·GPT-5 Chatmath·GPT-5 Chatreasoning·Gemini 2.5 Pro
Hype vs Reality
Attention vs performance
Gemini 2.5 Pro
#59 by perf·no signal
GPT-5 Chat
#1 by perf·#1 by attention
Best value
GPT-5 Chat
1.5x better value than Gemini 2.5 Pro
Gemini 2.5 Pro
10.0 pts/$
$5.63/M
GPT-5 Chat
14.6 pts/$
$5.63/M
Vendor risk
Who is behind the model
Google DeepMind
$4.00T·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
7 benchmarks · 2 models
Gemini 2.5 ProGPT-5 Chat
Aider polyglot
GPT-5 Chat leads by +4.9
Aider Polyglot · measures how well AI models can edit code across multiple programming languages using the Aider coding assistant framework.
Gemini 2.5 Pro
83.1
GPT-5 Chat
88.0
Chatbot Arena Elo · Overall
Gemini 2.5 Pro leads by +22.1
Gemini 2.5 Pro
1448.2
GPT-5 Chat
1426.0
HELM · GPQA
GPT-5 Chat leads by +4.2
Gemini 2.5 Pro
74.9
GPT-5 Chat
79.1
HELM · IFEval
GPT-5 Chat leads by +3.5
Gemini 2.5 Pro
84.0
GPT-5 Chat
87.5
HELM · MMLU-Pro
Gemini 2.5 Pro
86.3
GPT-5 Chat
86.3
HELM · Omni-MATH
GPT-5 Chat leads by +23.1
Gemini 2.5 Pro
41.6
GPT-5 Chat
64.7
HELM · WildBench
Gemini 2.5 Pro
85.7
GPT-5 Chat
85.7
Full benchmark table
| Benchmark | Gemini 2.5 Pro | GPT-5 Chat |
|---|---|---|
Aider polyglot Aider Polyglot · measures how well AI models can edit code across multiple programming languages using the Aider coding assistant framework. | 83.1 | 88.0 |
Chatbot Arena Elo · Overall | 1448.2 | 1426.0 |
HELM · GPQA | 74.9 | 79.1 |
HELM · IFEval | 84.0 | 87.5 |
HELM · MMLU-Pro | 86.3 | 86.3 |
HELM · Omni-MATH | 41.6 | 64.7 |
HELM · WildBench | 85.7 | 85.7 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| Gemini 2.5 Pro | $1.25 | $10.00 | 1.0M tokens (~524 books) | $34.38 |
| GPT-5 Chat | $1.25 | $10.00 | 128K tokens (~64 books) | $34.38 |